Dental injector and extractor.



J. c. QUINTIN.

DENTAL INJECTOR AND EXTRACTOR.

APPLICATION FILED AUG.26.19I5.

1 ,1 89,735. atented July 4, 1916.

sTATEs PATENT omen.

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,'= Specification of Letter! Patent.

Patented July 4, 1916.

Applloatlonflled August, 1915. Serial No. 48,886.

Dental Injectors and Extractors, of which the following is a specification.

My invention relates to dental instrumentsand particularly to a form of instru -ment adapted to be used for both the injec-.

tion and extraction of certain substances into and from the canal roots of the teeth;

- for injecting hot air into the canals for thoroughly dryin out the canals preparatory to inserting t e fillings and for extracting the pus from ulcers in and around the canals. My improved instrument may also be used for the purpose of extracting the wax from molds to form seats and bonds for gold inlays and other like purposes as.

W. J. Brizius, Serial No. 1,140,660, May 25,

1915 for a wax extractor but I am not aware atent has ever been issued for the several 1mprovements herein disclosed. While my device partakes somewhat of the form and function of the device disclosed in the patent to the said Brizius, it should be understood that my improvements afford a greater range of utility than does the said patent.

Briefly described, my instrument is adapted to be connected with the compressedair and electrical supply systems of the modern oflice buildings, the air being heated in its passage through the instrument by means of the electrical connections and the air supply and discharge means being so arranged that the passage of the air through and the discharge thereof from one end of the instrument will create a partial vacuum in the opposite end of the instrument when it is used for extraction, while the discharge of the air from the opposite end of the instrument afi'ords means for injecting purposes.

- Referring to the drawings, in which similar characters of reference indicate the same parts throughout the several views, Figure 1 is an exterior View of the assembled instrument; Fig. 2 is a longitudinal section thereof; Fig. 3 is an enlarged longitudmal section of the left hand and Fi 4 a similar view of the central portion of ig. 2; Flg. 5 is an enlarged left hand end elevation of Fig. 1; Fig. 6 is a transverse section of Fig. 2on the line 6-6;. Fig. 7 is a transverse section of Fig. 2 on the line 77 F15 8 IS an enlarged fragmentary lon tu inal section of body; Fig. 9 is an enlarged lon itudinal section of the right hand end 0 the instrument; and Fig. 10 is a transverse section of Fig. 2 on the line 1010.

My instrument comprises an elongated cyhndrical body 1, preferably of wood, which is reduced at the forward end 2 and is providedwith a metal ferrule 3 at the opposite end and a removable head 4 having a knurled flange 5 and a reduced inner extension 6 which is adapted to be threaded into the rear end of the body 1. The head 4 and the reduced end 2 of the body are bored out to receive an elongated tube '7 which extends entirely'through the body 1 and the head 4 and has a rectangular lug 8 formed thereon which is adapted to seat firmly in a slot 9 in the extension 6 of the head 4 in order that the body 1 may be simultaneously removed from the head and the tube for the purpose of cleaning, or other pur oses.

The forward end of the tube 7 is extended from the reduced end 2 of the body and has a flange 10 and a substantially smaller threaded extension 11 for receiving and firmly holding a removable tip 12 which has a very small tubular stem 13 of any desired size and form for adapting the instrument to various uses. The central portion of the tube 7 carries an insulating element 14 of mica, asbestos or the like, and a sufficient quantity of relatively fine wire 15 is Wound around the insulation over the tube and connected at both ends to the feed Wires 16 which extend through the long bores 17 in the head 4 and are adapted to be connected with the electric lighting circuit by means of a suitable socket.

The rear end of the tube 7 is threaded into I he left hand end of die correspond to the interior of the tube 7 and a the outlets 23 and 24 and sleeve or ri exterior of t e 19 and is movable thereon by means off tllie knurled flan 22. The outer sleeve or ring 21 has an air discharge vent or outlet 23 which is adapted to register with a similar passage 24 in the periphery of the sleeve 19 and which communicates with the bore v25 therein. The ring 21' is limited in its movement on the sleeve 19 by means of a screw 26 which is secured in the wall of the sleeve 19 and extends through a peripheral slot 27 in the outer ring 21, so that an extreme movement of the ring on the sleeve in either direction will either register rmit the dischar of the air therethroug or changethe relation of the outlets, as in Fi 10, so that the air may not be discharged t erethrough,

The sleeve 19 has also a rearwardly' directed extension28 which is provided with several flanges 29 for the purpose of.receivintg and holding. a rubber-air supply tube 29' rmly on the sleeve, and this extension is bored out to receive a substantially smaller air tube 30 which is rigidly secured by soldering or otherwise in the bore of the extension 28 and is extended through the bore 25 of the sleeve 19, thence through the tube 7 to a point near the forward end thereof and is at this point bent around for a convenient distance in an opposite direction toward the fear end of the tube as at 31, shown-in Figs. 2 and 4. Thus, when the air is admitted to the tube 30 from 'the main air supply tube 29' which is connected with the compressed air supply system of the building, the air outlets 23 and 24 in the ring 21 and the sleeve 19 being in registration, the air will flow through the entire length' of the inner tube 30 and will be discharged therefrom at the end 31 into the larger tube 7 through which it will pass into the bore 25 of the sleeve 19 and thence out through the valve assages 23 and 24. This passage of the air t rough the tube 7 will produce a partial vacuum in the forward portion 32 of the tube 7 adjacent to the tip 12 and a suflicient suction will thus be created to extract and withdraw the substances from the root canals of the teeth when the instrument is properly inserted therein, or, if the small end 13 of the tip is applied to the wax mold for inlays, the tube 7 and the tip 12 being sufliciently heated by means of the resistance to the flow of the electric current in the wire 15, the wax being melted at and by the point of the stem 13, will be caused to flow and'will be drawn into the stem and from thence into the tube 7. After the wax extracting operation, the wax being kept in the tube in a liquid state by means of the heated tubes, may be discharged from the instrument through the tip 12 by closing the outlets 23 and 24 by the 21 1 is pivotally held on the 'when the air valve openin movement of the ring 21 on the sleeve, when the compressed air in the tubes will be discharged throuigh the tip together with the liquid wax an the latter may be collected in a suitable receptacle for future use.

The instrument may be used as an air syringeby the movement of the valve ring 21 so age to chase $518 outlets. 23 and. 24 afild thfi air ea duringits assa t rou the tubin may be injected int d the anal ro ts of the teeth for thorou hly drying out the canals 'perparatory to t e filling operation. Medicines may be drawn into the tube 7 23 and 24 are in registration by means of t e vacuum created in the forward end of the tube 7 and may then be injected into the canals by closing the outlets 23 and 24 when the. instrument of tips may be provided in sets for use with the instrument, thus increasing its range of usefulness and adapting it to various-treatments.

I i It should be understood that myjimprovements consist in the means for using compressed air for both injecting and extractmg purposes without altering the instrument or changing the connections from a compressed air to a vacuum supply, or vice versa, the instrument being thusreadily convertible for use;- the removable tips by means of which the same may 'be easily sterilized prior to their use; the connection between the head 4 and the tube 7 so that the body 1 may be readily removed therefrom for the purpose of cleani by a single operation, and the simplifidif air and electric connections. The entire'instrument may be readily cleaned and sterilized by removing the body 1 from the tube 7 and head 4, re-

' moving the stem and tip 12 from the tube 7 and the tube 30 from the tube 7.

Having thus described my invention, what I claim as new and desire Letters Patent for, is:-

1. A dental injector and extractor .comprising a cylindrical body and a separable head therefor, a metallic tube within the body and removably secured to said head, a heatin element carried by said tube, a removab e tip for the tube provided with an o ning in communication with the interior 0 the tube, and air supply means exterior of the body, and means for regulating the passage of the air throu h and dischar from either end of the tu at will for t e purposes set forth.

2. A dental instrument comprising a body and vacuum tube removably secured to said head and held firmly in the body, a heatlng element exterior of the air tube and within said heat compartment of the body, a removable tip carried by said tube and extending forward of the body having an opening in communication with said tube, a1r supply means for the tube, and means for supplying compressed air to and discharging the same from the end of said'tube for producing a partial vacuum therewithin for use as an extractor and in a single direction therethrough for use as an injector.

3. A dental instrument capable of use as an extractor and injector of substances and comprising an inclosing cylinder, a combined air and vacuum tube within the body, a heating element carried by the tube, a removable tip on the forward end of the tube and communicating therewith, and self contained vacuum producing means for the extraction of substances and drawing them into said tube, and compressed air means for ejecting the substances so extracted from the tube, and means exterior of the body for converting said instrument from one to the other of said purposes.

4. A dental instrument comprising an elongated body having a heat compartment therein and a separable head, a metallic tube extending through and from opposite ends of the body, a removable tip secured tothe forward end of said tube and having an opening communicating with the tube, a heating element carried by the tube, means for supplying compressed air to the tube, and means for regulating the discharge of the air therefrom at opposite ends, respec-' tively for injecting and extracting operations.

5. A dental instrument including an outer shell provided with a separable head and having a heat chamber formed therein, a metallic tube removably secured to said head and extending through said shell, a heating element within said shell and surrounding said tube, a removable tip secured to one end of said tube and a1r supply means at: .tached to the opposite end thereof, compressed, air means for selectively injecting and extracting into and from said tube, and means for converting said instrument from one to the other of said uses, at will.

6. A dental instrument having compressed air means for discharging substances therefrom and shelf contained compressed air vacuum producing means for extracting and inducing substances into said body, electric heating means for heating the air in its passage therethrough, and valve means for converting said instrument from one to the other of said uses, at will.

7. A combined wax extractor and injector comprising a cylindrical shell provided with a separable head and a heat compartment, a central tube extending through said shell and provided with a removable tip at the forward end having an opening communicating with the tube, means for simultaneously passing a current of compressed air in opposite directions in said tube for producing a partial vacuum therein adjacent to said tip, and means for discharging the air from the tube through said tip, at will.

8. A dental instrument comprising an elongated body provided with a separable head and a heat compartment, an air tube centrally disposed therewithin, a removable tip carried by the forward end of the body, air supply means for said tube, and means carried by the tube exterior of said body for regulating the passage of the air in and its discharge from said body for injecting and extracting purposes.

9. A dental instrument comprising an elongated body having a heat chamber formed therewithin, a metallic tube extending through and centrally disposed in the body, a separable head for said body removably secured to said tube and forming a closure for one end of the body, a ti removably held on the opposite end 0 the tube and provided with an opening communicating with the interior of the tube, air supply means for said tube, means for heating the air in said tube, means for regulating the passage of the air through said tube so as to produce a partial vacuum within the tube, and means for regulating the discharge of the air therefrom and for thus converting the instrument from an injector to an extractor, and vice versa.

10. A combination hot air syringe and extractor provided with an elongated cylindrical body, a metallic tube extending the entire length thereof, removable discharge means attached to the forward end of the tube, air supply means attached to'the opposite end thereof, air valve means for regulating the direction of passage in and discharge from said tube, and means for heating the air in its passage therethrough.

Signed at Los Angeles, in the county of Los Angeles, and State of California, this 20th day of August, 1915.

JOHN C. QUINTIN.

Witnesses:

KATIE T. QUINTIN, CATHERINE ALTA Fm. 

